split servicepoint_binding_uniffi into own crate

src/errors.rs

@@ -0,0 +1,7 @@
+#[derive(uniffi::Error, thiserror::Error, Debug)]
+pub enum ServicePointError {
+    #[error("An IO error occurred: {error}")]
+    IoError { error: String },
+    #[error("The specified brightness value {value} is out of range")]
+    InvalidBrightness { value: u8 },
+}